Abstarct: In mine and civil environments, many incidents always happen due to equipment existence despite to safety. And for this matter, personnel rescue team should be fully prepared. At the time of the incident, the rescue team needs to rescue the lives of all personnel who have been injured in different parts with the aid of tools that they have. This study was investigated in part of Garmsar salt mine, With the purpose of prioritizing the rescue injured personnel. For this regard, some parts of this mine have been selected, that include a main tunnel with 8.1 m2 cross section and 150 m length and another tunnel with 36° angel and 5.7 m2 cross section. The ventilation conditions in this section are as follows, in different times, the airflow into main tunnel has two different volumes as 3 and 6.48 m3/s and the airflow in second tunnel is zero or 2.85 m3/s. According to mentioned points, four ventilation scenarios has been introduced. In the following, the relevant CFD model to each scenarios Prepared and validated. In the next step, indicator gas test with proper parameters designed that including appropriate point of release determination, sampling, indicator gas release time for sampling (10 min), suitable gas determination for indicator gas (methane gas), and suitable indicator gas rate of flow for sampling (0.5 m3/s). This test carried out for each scenarios in AnsysFluent application as well as in mine environment, after validation in CFD model. Output of each test for any scenarios was a density-time plot of indicator gas. This plots aim to determine the dominant scenario to ventilation system with use of indicator gas test if necessary, and investigation of density-time plot similarities to preexistence scenarios. For this purpose, an indicator gas test carried out with lack of knowledge of dominant scenario to ventilation system, and dominant scenario to ventilation system has been determined.